SCO Openserver System Release 5.0.7 

          While installing or configuring an new disk with OpenServer 5.0.7,
          the operating system sees the disk but the capacity of the 
          disk that is seen is only a small percentage of the actual 
          size of the disk.

          The cylinder limit in the OpenServer 5.0.7 disk geometry is 65535.  

          The exact geometry is determined by the specific disk controller 
          driver that you are using.  

          Most SCSI Drivers use 255 heads and 63 sectors/track for large disks.
          Multiplying all the maxima:  
           
          65535 * 255 * 63 * 512 bytes/sector  
           
          gives a maximum disk size of 539043724800 bytes or about 539GB.

          The maximum capacity of a single disk that can be recognised by 
          OpenServer 5.0.7 is dependent on the disk driver being used to  
          control the disk. 
           
          Many SCSI Controller Host Bus Adapter (HBA) Drivers supported with 
          OpenServer 5.0.7 are limited to recognising just over 539GB of disk 
          capacity. 

          If you present a physical or logical drive that is say 600GB size to 
          one of these drivers then OpenServer 5.0.7 will only see a disk of 
          61Gb in size (i.e. 600Gb-539Gb). 
           
          The wd disk driver (BTLD) included in Supplement CD 5 has been 
          tested with IDE disks up to 1Tb in size and theoretically can 
          support IDE disks up to 2Tb in size. 

          Supplement CD 5 is available to download from: 
           
          http://www.sco.com/support/update/download/release.php?rid=187 
           
          If you have a SCSI based system where you are not seeing 
          the full capacity of the disk at install/configuration time, and 
          the disk is greater than 539GB in size your options are: 
           
          1) If you are using Hardware RAID to build the Primary 
          disk try using a logical disk size that is less than 539GB 
          to see if this solves the problem 
           
          2) If you are using a single SCSI disk that is greater 
          than 539GB in size then replace it with a primary disk 
          less than 539Gb in size 
           
          3) If you have the option to use an IDE controller and 
          disk as the primary controller and disk on your system 
          instead of SCSI then this may be an acceptable alternative 
          in some cases 
           
          4) Upgrade to OpenServer 6.0.0 which does not have these 
          disk size limitations.

          TA#118463 "Are there any disk and filesystem size 
          restrictions in OpenServer 5?"